Grinding and polishing machine.



u. Hpaom. GRINDING AND POLISHING MACHINE.

APPLICATION FILED SEPT- I3. IQI.

Patented Mar. 18,19191@ 3 SHEETS-SHEET I- INVENTOR BY Y A ATTORNEYS- GRINDING AND POLISHING MACHINE.` APLlcATxoN man sEP1.|s.191s.

y 1,3%?,5961 1 1 'Patented Mm. 18,1919.

` s SHEETS-SHEET 2.

VC. Hs RO'YHH GmNDlNG AND PoLlsHlNG MAmn'NE.

vAPPLICATION FILED SEPT- !3, ISHS.

Patented Mar; 18,1919..

3 SHEETS-SHEET 3 v flNvE'NoR-f- CIK ' memes f gitudinal guide channel y11 in its upper sui'- face." Arranged in said guide channel 11 is a slideinemlier 12 capable of reciprocatory longitudinal movement. Projecting upwardly from said slide-member 12 are a pair of pedestal bearings lin which is journaled a spindle, 14, upon the inward end of which is `fixed 4a supporting disk 15 to the :tace of which is suitably secured an abradf ing-wheel 16.v Fixed on said' spindle' 14,`

preferably in a position disposed between `said pedestal bearings 13, is a belt` pulley y lover' which a power transmission belt '(not shown) maybe run te impart a rotary 15 movement to said spindle'and supporting j disk, and consequently to the abi-riding wheel attached to 'the latter. Asfthus mounted and'dis'posedtlie saidv v abrading-wheels Sand 16 have their outer side faces opposed to cach other, and slightly spaced apa 'v A kConnected with said bedeplate 10 are a pair of outwardly and laterally projecting bracket-portions 18. Secured upon said bracket-portions 18,' adjacent to the outer free ends thereof, are longitudinally alined Abearingl pedestals 19 in which is journal'ed f driving, shaft 20. I Said driving shaft 2O v, is provided' .Wi-tha fast .pulley 21 and a loose Ien pulleyf22 with which a drivingbelt, (not sho\vn), niay lie-associated for driving said v shaijt'QO. vFixed. on said shaft 2G is'adriving! `gear 23. Also secured upon said bracket-portions 18 are a second pair of lon 'tudinally alined 'bearing pedestals 24 in Which is journaled a lay or counter-shaft 25. Fixed 'upon said counter-shaft 251sa large l gear 26`which meshes. with said driving gear 23, so that the rotaryimovement of the driving shaft isI transmitted to said countershaft at a properly reduced speed. Fixed upon the inward/end of said counter v'sliait is a crank-wheel 27, and fixed upon the youtward end of said counter-shaft 25 is a i'ront yside'of said bed-'frame 1 an upwardly projecting standard 131 provided with a socket-portion 32 at its freer end, and each having at tlieir'outei' ends an upwardly projecting arm' .fterminating in 'a socketportion 34 alined with the opposite socket-portions 32101: the-standards 81'. Secured in saidsooketsportions 32and 34,` so

. as to extend therebetween, are parallel guide-,

rods 35. rods 85,- so as to slide back and forth thereon is a reciprocating; carriage-member 36, provided at itsouter lower end with a trans! verse wrist-pin' 1' 37. lConnect-ed with the outer ends ofLsaid bracket-members are Mounted upon said parallel guide# a pair of bearing-members 3S in which is mounted a rock-shaft 39, having a rockingarm A40 fixed thereon, and positioned `between tlie said bearing-members 38. A connecting-rod 41 interconnecting the free end ofsaid rocking-arm 40 which thewrist-pin 37 of said carriage member-36 translates the rocking;r movement of said rocking-shaft and rocking-arm into a reciprocating sliding movement which is transmitted to said carriage-meniber 36. The means for rocking` said rocking-'shaft comprises a second rocking-ar`ih 42 fixed thereon, the freel end of which is operatively connected with said crank-wheel 27 of the counter-shaft 25 by means of a suitable connecting-rod 43. The said carriage-member 36, as thus 'mounted and operated,fis positioned in alineinent with the opposed faces of said abrading wheels 8 and 16. Rotatably mounted in connection with said carriage-member 36 is a spindle 44 provided' at its forward end with a cradleportion 45 constructed to hold a. knife-blade 46, so that the sides of the .tang 47 or' the latter are exposed to the action 'of said opposed abrading wheels 8 and 16 at proper times. Said cradle Iportion 45 is yprovided with a stop-post 48 at its free end against whichy saidgtank 47 abuts, and isfurther provided with side-guards 49 for engaging the sides of the blade 46 to hold the sainel edgewise in supported relation upon said cradle-portion. Journaled in said carriageincxnberBG, so as to be positioned beneath said spindle 44 is a transverse'spindle 50 having fixed thereon a wheel or drum 51. Said spindle 44 is also provided with' a small wheeler pulley 52. Secured to the circumference of said Wheel or drum 51 is a. pull strap 58, which passes around under the wheel lor drum- 51, and thence upwardly over .the wheel or piilley52 of said spindlemember 58, one end of which is anchored to a portion of said carriage-member 36, and the opposite end of which is anchored or fixed to said spindle 44. The tension of said spring-member 58 tends to' so rotate said spindle 44 and its cradle-portion 45, as to carry. the stoparm 57 into engagement with said stop-pin 56, and to normallyretain the i same in' such engagement, thereby normally CIK .by its above. described transmission niechnnism. Whenthe'eurrnige-xneinber le 1S inv ,its retracted position, the operator inserts n knife-binde ein the.eredleportio1rflf5, with. the tang Lilfof the binde. 'rwnrdly presented.. fis the carringeniember Bois; slid forward on the'gnide-rods B5 the tung 47 is carried between the oppoeed 'inees of the abred-ing wheels 8 ond 16, und held in position'to be operated. :upon inthe manner `subsequently to be described. y Ater'th'e opposite sides of n. 'tlietnmg- ./l'l' has been .ground by the opposed l no finies of the abruding wheels; the' carriageineinber" is retracted to withdrew` the1blnde .4i-G from between seid nbrading wheels. AS the' carrie-ge-i'i'ieinber is thus. moved beek werd upon the guide-rods 35,'the trip-erin 54de carried past the trip-cam 59,'so that its enti-.frieden roller 55 engages the lutter, und in passing over the saine 'causes the tripgnrrn to be swung forward und up vvnrdly. Theupwn-rd swinging of said' trip arm rotate@` or .reeks said transverse spindle hndvfits wheel or drum 5l, thelzitfter by y:suoli rotation .wiiulingnp upon itself the pullstrnp.y .53,/w/vliich1 is thereby given n downward..pull` This vdo.vnw".ufd pull of the bulbs-Ning, byrenson of its connection with` the wheel or pulley of the spindle il, tends tonotute the letter .imparting to the sume :t half turn., which tmfnsfiqisid down the medie-portion 45, thereby permit ting the ground blader-lli to drop out of the crzuilefportion into u Suitable receiving receptacle, the trip-:nim filings away from the trip-Cain its opposite swing ini,r momentum arrested by the engagement of its anti-friction. roller 55 with lthe stopfprojeetion Si) so that n too sudden movement. thereof( luis no 'ttuuieney to disnrrange the pull-strap 53 from 'proper relie tion to the respective wheels 51 und The rotation oi' the spindle .4.4, for the purpose and-in the manner aboveldescribed tends towind uli-und thereforeincrease the ten- Sion of suio.-spriugr-member 58, so .that when ll1oi-i.'i]v:umr'54 isrelensed from the triprzun 59, the tension of the Spring-'member will causo n i'i\.\'rise or return rotation of the spindle 4l, and through the opposite pulling .ofr the pull stray 55., .n consequent reverso or. return rotation of. the traiiisverse spindle fithuyjhich returns nl). parte to normal initial position, and again posit-ions said cradeortion ready to receive another knife-b nde 46, to be carried forward between the ebrud-- ing wheels 8 und 1G by the forward,reciproeiition of the enrrizrg'e-member 36.- It muy be mentioned that, as theu enrringe-meunier 36 moves forward, the trip-:mn und its nntirietion roller will pass over the trip- 1am, but sinoe the motion iS reversed no turning eleot impartedto the spindle 44, its the opposite or reverse rotation ot the transverse Spindle und vits wheel or drum 51 merely results in slneliening the pull-sirop 53 ne will be understood. n

' zlhe snidnlnjmling wheels 8 and 16 nre initially .positioned so that their opposed tunes. are abnormally sepa-rated in sueh n mnnnerlhn-t vthe tnngrl of the kni'lebhule .Allmziy be easily Carried therebetween. 'The abrnding wheel S and .its supporting and transmission mechanism hns n' nornml fixed or stationery position, while the nbrnding wheel 16 and its supporting undtrunsmission lneolmnism isvmou'nted to be capable of movement et proper times townrdsuid fixed The movementgof Suid nbrncling wheel lli toward 'thelv :xbrnding Wheel 8 is effected by n pull-spring (il. one end of which is unehoredupen :L post ($2 `lived insnid bed-plete l0. `and its' opposite end anchored upon uv post 68- lixed in :i ron- Venient part ol: the reciprocating support ing ineens for sind :ibraiding-wheel und its spindle. The tension or' sind .pull-spring ('1' tends to pull smid Slide-member l2 forward .in 'the guidielmnnrl ll.l The menus -i'or controllingtluvmovement of saidv nbrzulingwheel'll' toward the nbrnding"wheel S, consiste in n.. lever member 6l .Julerumed on :1.

vbneliet-slirl G5 connected with snid bedplnte l0.. (lne end 'of sind leiter member (il is interconmeird with Suid slide-member 12 bymezvns of a Connecting-link 66,' while the opopsite und ot Said levenniember (il is provided wit-hun enti-friction roller y6T which rides operativel)Y upon s-.iidv oum--\vlieel :'28 und its cnnrplntes 29j The notion ofsuid cum-wheel upon the lever-member is timed with relation yto the movement of :Suid enrringe-inember 36, Sothnt :is the lutter le ri:- tru-eted, the ezuu-wheels rotation .carries a. cum-pluto 29 into engagement with. the roller end of the lever member (i4, thereby causing n tendingtopull upon the connecting link 6G, and consequently retrnotin'g the slide-1nember 12 against the tensioi'i of the pull-spring ,61, and thereby withdrawing or separating rocking' movement oi the lutter" abrlading-wheels. As the carriage-member 36 mores forward, curi-ying"another, knife-l i bladez .in its Cradle-portion 45,- the nbrnding.

- wheels are maintained in separated relation untilthe tang 47 partially enters between the same, whereupon the rotation.` of the cam-wheel 28` carries the cam-plate 29 away fromthe roller end of the lever-member 64,

- allowing the latter to drop against the lower face ofA the cam-wheelgthusl permittingv an opposite swing of the lever-member, as the pull-spring 61 is thus freed to pull forward'l .the slide-member 12 and the abrading wheel n 16 and its supporting mechanism carried thereby, so that said .abrading-wheel ,'16v' closes upon thetang 47 and not only-'grinds the adjacent face thereof but also'y presses the opposite face thereof into operative re` lation with the abrading wheel 8. ,This4 operative relation -of the abrading wheels 8 and 16 to the tang 47 is continued until i the latter is carried completely, forward,

be' noted that the movement of the carriage-- 'member and its cradle por-tion, vand theA opening and closing movement of said abrading wheels are relatively timed since each mechanism is properly controlled by the rotation of the counter-shaft as driven both driven at high speed at all times by the fpulleysof their respective spindles, and inldependently of the operation of lthe driving 4shaft 20 and counter-'shaft 25.

Since the thickness of the tangs ofk diferentsizes of knife-blades varies, it is desirable to provide means for. adjusting the abrading wheels 8 'and 16,' as to theirI initial positions, relative "to the work to bdone;

y To this end the fixed or stationary abra'ding'- V wheel may be properly positioned by mov- 'ing'the slide-member 4in the guide-channel r 3 of the bed-plate 2, in Ithe direction desired, l

this being accomplishedby meansof an adjusting screw 68, whichturns in a stationary nut 69 fixed on the end of the bed-frame 1,

j 'slide-member 4 by means of a coupling lug Q70, projecting from the latter, and. the

collars 71 ixed'to said screw on either side" l of `said coupling lug, soitha't` while said screwis free to turn, its longitudinal move-` ment will nevertheless' be imparted tosaid slide-member 4. The reciprocating abrading wheel 16 and its contrelling' mechanism,

from the main driving shaft. It Vwill also be 4understood 'that the abrading wheels are' `the end of said screw being secured to said@4 o 1.'Inra machine of the kind described, a

paircf lab'rading-wheels'disposedto inu- 4.tually oppose their. operative faces means l for rotatably mounting orieof said ab the bracliet shelf 65, the ,end ofk the screw being rotatably securedfinf a i\xed coupling 74 secured upon the endgofsaid bed-frame 1, so that as the screw is turned the nut-piece 73 is caused to travel thereon in the desired direction,` and con'sequentl Aimparts the de-` n sired movement to saidbe -plate 10 and the mechanism-` supported uponk and associated` therewith. The bed-,plate 10 when adjusted as desired maybe locked to said bed-frame `1 in rigidly secured relation thereto by means of the bolts 7 5. Slots.76,formed in saidv bed-plate 10, through which said bolts k7 5 extend` permit the necessary longitudinal adjusting movements of said bed-plate relative to the bed-frame.

.0f course it will be understood that the means for adjusting the position of "the abrading wheels-is subject to more or less wide variation as to mechanicalmeans and dtails of construction, and therefore, the

ymeans above described is vde en'led merely4 illustratlve, and I do not necessarilylimit p `myself to itsparticularnse.

y It will also be understood that th machine may be equipped with various kinds of abrading wheels according to thekind of work. desired to be done. Forcoarse grind-4 ing carborundum or'emery wheels may be used" in various degrees'of grain, and for the finer abrading efects,such as 1n olishing,

cloth, buckskm or any, other suita lewheel mayvbeused, the operation of the machine I being essentially the same with alltypesof abrading wheels. l i

I am aware that some changes maybe claims. Henceixl do nt limit. the present,

Ainvention to ft e .exact arrangements and' ,100 made in the several arrangements aand'com-4 combinations of the. various devices and part/s' asset forth in the above specication,

nor do -I conine'myself to the exact details krof the construction of the said parts as illustrated in the `accompanying drawingsi Iclainuradin'g `.wheels inafxed position, means for rotamay be properly positioned by moving the.;

bed-plate` 10 upon the bedframe 1, in the 1 in a nut-piece .73 depending `from an inte'- gral part of -saidbedplate 1.0, preferably tably mounting 'the other of said abrading' wheels for. axia1^.reciprocable movement towardiand awa fromsaid fxedabrading wheel to mutual y...sep arate said wheels. for

the receptionofwork'therebetween, a'lever means interconnectedfat' one lend with the mounting offs'aid.zmovableyheeh a camwhelrfor bperfirely the Opposite i sinne to govern the reciprocnble n'iovement of seid inovnlile'wlieel, spring 'i'iiieniiii for iwheel is dri ven, si, reciproco-ble work suplli porting ineens adapted to curry the work lielziveen ii nd in ,oi'ierative relation to seid olii-siding' wheels, :ind menne for reciproentinfif mid 'work enpportinlglf menne in timed -relntion to the separating movement of seid nlirziding 'iylieel 1n n. inneliine of the kind described, a pair ot' olii-:tiling` wheels disposedto mir tinilly oppose their opere-tive feces, ineens iler iotiitzilily vmounting one of seid` :ilii'nding Wheels in :itixed. position, menne for rotn tfilily mounting,r .the other of Silid nlirznling,i wheels for axial ire-ciproesrlile movement ytoward :ind nwiiy from sind txeid :ibrnding' wheel to iniitiiiilly seperate sind wheels for the reception ot' work therebetween, ai, lever menne interi-onneeted nt one end with the mountingot' Seid n'iovnlile' Wheel, :i cumwheel 'l or operatively engaging the opposite l end oi Suid lever menne for oscillating the .sinne to govern 'the i'eci'procnlile movement of. enid niovnlile iwheel`r Spring; menne for `movingv and holding' Suid movable Wheel' in oi'ierntive relation to Seid. fixed 'wheel asgov; eined liy the operation of said. lever mesme; tiz-iiisminsi'on menne, 'lofni. vWliieli Enid enne .wheel is' driven, :tfvreciprocnlile corrie-ge- 'nieinlier,` guide ineens,V for slidohly snpporting' sniil ciiriizige-inemlier, n rook-shaft hzivingi n i-ocliiig-iii'in, ii, conneotingmid interf eennecting` smid corriige-xnen'ilier with said' rorkinzej-nrni, ineens operated 'from seid transmission menne for oseillntiiigeoid rockrshaft, :nid n vwork supporting crn'dle carried liy nid enrriiigeinemlier tor intro `iueing the n'orl( between. und in operative relation to smid nl'iiiidine' wheels.

3. ln :i i'iineliine o the kind leserilied. :i piiii' ril' :ilii':i liiii wheels disposed to mii-- timlly oppose theiroperiitive tncee, ineens Hl'or rotnt'iilily mounting one of snik-l olii-inline' wheels in :i i'ixed position7 niennil for, i'otzitnlily mountinga theollier of .iinid :iliiiidiiig wheeh` for :ixizil i'eeiprocnlili-, n'iovilixiient toward :ind nwiiy from sind fixed nl'ii'zidinnwheel to iiiutiiiillifI sepinzite sniil wheels jor 'the i'effeption ol" n'oi'lc there-lietweeii, :i lever menne' intereonneeted ot. one end with the 'inoiintiiigxot-smid nioviilile wlieeih n onin- VAwheel YFor operatively' engaging' the opposite,

end ol'Y Huid lever menne io-ri'ieeillnting the Same to tgovei'ii the recipronilile movement;

ol #nid niovnlile wheeh Springi 'mennel #for moving' :ind holding; #nid iiiovnlile wheel in operative.relution to nniil fixed `n'lieol :is lgoverned lili.' the opei'ntion ot" seid Alever nieaiiisH transmission menus lroni which #nid (L ffiioving und holdinfii said inoynble wheel in .:iiini\'lieel in driven, :i reieiproenlile enrrizigemenilier, guide' ineens for slide-bly snppolti ing seid eni'riafge-iiieinlier, :i rock-shaft heving :i rocking-firm, n connecting-rod intereonnoet-iiigi` snid corringe-inenilier with seid rocking-erin, ineens operated from seid transmission niezins for oscillating` snid i'ork-Slint't,

n. spindle joiirniiled in sind rnrringe-inemlier,

:i work supporting` erzidle` Secured 'to the foi'- wzird end et sziid spindle, :ind ineens operating' upon the .retract-ion of sind carriage-l i'neiiilierto rotate seid spindle for upsetting seid verndle to dislodge the' inisl'ed work y l'liereironi.

:illy oppose their operative feces, means for retntnlily mounting one of sziid :ibrziding wheels in 1i fixed position, menne toi rotntfr lily mounting the other of said :ilirnding wheels fo :ixinl reciproenhle movement toward :uid :iivuy from Said fixed nlirsiding wheel to mutually Seperate seid wheelstor the reception of Work therebetween, si, lever. ineens interconnected at, one end with the mounting of" said iiioveble wheel', :i coin-- wheel for operatively engaging ythe opposite, end of sind lever ineens rtor loscillating the Sinne to govern the reeiprocnlile .movement 'fsnid inovnole ,.nilieel, spring menne for operative rel ation to siii d fixed wl'ieel as governed hy the operation oi seid lever menne, transmission ineens from which Seid e:iin Wheel is driven, :i reeiproefilile cn'iriagemember, guide means for slidebly Asupport-- ing snid eerriege-nieinlier, n. i'oclefilintt; liming' n roeliiiignrin, n, eoi'inectiiig-rod interconnecting said enrri:ige-member ywith sind rocking-ovni, ine-mis opernted from Seid tarnnsniiseii'in' menns'for oscilliitingenid roel(- nheft, e. Spindle jonrnziledin Said carriageinemlier, n work ,supporting cradle secured to the torivzii'd end ol seid' spindle, :ind 4menne opeintinggf npon the. .retraction of Suid enrri:ige-nieinl'ier-to rotule seid spindle for iipsetting siiid eriidle to dislodge the finished work therefrom, comprising ny transverse si'iindle journnled in seid. carriage-member having :Lilriim iiionnted `tl'iereon, ii, wheel on Hziid first mentioned Spindle7 :i pull-Strap anchored iiiion--nnid drumv and, hfiv'ingits opposite. end secured to .seid wheel, ii. trip- :irn secured to siiidti'niisverse spindle, er.

trip-cum with which nnid trip-:imi engages iipon the retraction of sind oiiii'inge-member, spring.Y meiinseiignged Witliinnid first mentioiied'spii'idle to return the seme to normal for determining position.J "und stop ineens and its the normal position ot' said 'spindle -vcradle. i

5. ln n mtu-.lime et. the kind described, :L

' lied-frame, n liedpln.te having n longitudiiml guide cliiiniiel-tizx'edv ndpiecnt to one end 'of izo;

said bed-frame, a slide-plate mounted in said channel having a pair of bearing pedestals kprojecting upwardly therefrom, a spindle journaled in said bearing pedestals, a pulley on said spindle'for rotating the same, a fixed abrading wheel fixed on the inner end ofsaid spindle, means for adjustin said slide-r from, a second spindle journaled in said bearing pedestals yin axial alinement with said first mentioned spindle, apulley 'on said second spindle for rotating the same, a movable abrading-wheel on the inner end of said. 4second spindle having its operative'face opposed4 to the operative face of said lixed abrading Wheel, spring-means engaging said I second slide-plate to draw the same forward to position said movable abrading wheel in operative relation to said fixed abrading wheel, means for adjusting said second bedplate to determine "the operative spaced relation of said movable abrading wheel from said fixed abrading wheel, automatic means for retracting said second slide-plate to abnormally separate said movable abradingl wheel from saidjiix'ed abrading Wheel to permit the insertlon of work therebetween, a ii'eciproeable Work. supporting means operating in timed relation to the 'movements of /said movable abrading wheel adapted to automatically carry to and. from operative relation kto said abrading Wheels the work to be done.

bed-frame, a bed-platebaving a longitudinal guide-channel fixed adjacent to one end of Said bed-frame, a slide-plate mounted in said channell having a air of bearing pedestals projecting upwardly tl'ierefrom, a spindle f journaled in said bearingpedestals, a pulley ,on-said spindle for rotating the same, a iixed 'fabradingfwheel fixed on the inner end of f' said'I spindle, means for adjust ingsaid slideplate todetermine'the fixed osition oi said abrading wheel; ya second be(` plate having a longitudinal giiidechannol mounted on saidy bed-frame 'adjacent to its pppsite end; a

second slide-plate lonlgitudinally reciprocable in said guide-channel having a'pair of bearing pedestals 'projecting upwardly therefrom, a second spindle journaled insaid. bearing pedestals in axial alinement with said first mentioned spindle, a pulley on 'said second spindley for rotating the same,.a movable abrading-wheel on the inner end lof said second. spindle havingits'operative face/opposed to the operative face of said fixed al'rading wheel, spring-means engagtion oisaid .abradin i. ing said second slide-plateto draw the same forward to position said movable abrading wlieelin operative relation to. said fixed abrading wheel,`means for adjusting said second bed-plate to determine the l'operative spaced relation yof said ymovable abrading'wbeel from said. fixed abradingwheel, 'apivoted lever mounted in connection .with said second "bedfplate, a link means interconneeting said second slide-plate with one end `of said lever, a lay-shaft, means for mounting said laysliaft,a cam-wheel operated yby said lay'shaft and engaging the op.

posite end of said lever to swing the same te.

cause the retraction of said second slideplatefor abnormally separatingsaid niev- `able abrading' wheel from said fixed abrading wheel, means for driving said lay-shaft, a reciprocable work supporting means op erating in timed relation tothe movements' of said movable abradingwheel adapted to E automatically carry to and from operative relation to said abrading wheels/the' work to be done.

7. In a machine of the kind described, a

bed-frame, a bed-plate having a,longitudi-l ynal guide-channel ,fixed adjacent to oneend ot'v'said bed-frame, a .slide-plate mounted in f said channel having a pair of bearing perlesw tals projecting upwardly therefrom, a spindle journaled in said bearing pedestals, a pulley on said spindle for rotating the saine, a fixed abrading Wheel fixed on the inner end of said spindle, meansA for adjusting said slidefplate to determine the fixed posiv Wheel, a second bedplate having a longitudinal aide-channel mounted on said bed-frame a jacentto its opposite end,a second slide-plate lengitu' 6.111 a machine of the kind described, a u

dinally reciprocablein` said guide-channel having a .pair of bearing pedestals project- -ing upwardly therefrom, a" second spindle' journaled .in said bearing pedestals' in axial alinement `with said first mentioned spindle,y

a pulley on said second spindleor rotating the same, a movable abrading-Wheel onl the inner end of saidsecond spindle having its operative face opposed to thev operative face of said fixed -abradingwheel, spring-means engaging/said 'second slide-plate ,to draw the same `forward to position said movable abrading wheel `in operative relation to said iin connecting'vsaid second slide-platqlwith one yend of said lever, a lay-shaft, liieans for mounting said lay-shaft, a cam-wheel operated by said lay-shaftand engaging the oppositeend of said lever to swing the same to cause the retraction of said secondslideplate for abnormally separating saidy inovable abradng wheel from Said fixed abrading-wheel, means for drivingsaid lay-shaft, a. i'eriprorable earriageiiieniber, guideineans projeetng laterally from said bedfraine ioi slidably supporting saidrarriagemember, a rock-Shaft having a rocking .arni joiiinaled at the outer end of said 'guide means, a. eoiiiieetiiig-rod intereonneeting said earr'ageaneinber with said roeking arm, a Crank-wheel on said lay-Sha ft, a seeond rocking-arm `on said rook-shaft, a Coi-iynertiiig ;-rod interconnecting Said Voigankw wheel with said second rocking-armi and a work supporting cradle Carried by said ear.- riage n'ieinber for introdiieing the work between and in operative relation rte said abrading Wheels. l i

8. In machine of the kind described, a bed-frame, a bed-plate having a longitudinal giiide-ehannel fixed adjacent to one end of said lied-frame, a slide-plate nioiinted in said channel having av iair of bearing pedo, `tais projecting upwardly therefrom, a spindle journaled in Said bearing pedestals, a piilley on said pindle for-rotating the same, affixed aliradiiig Wheel `fixed on the inner end of said spindle, means: for adjusting saii'lslide-plate to determine 'ilie fixed posi i-ioiiof said abrading Wlieelfa second hedplate having ya longitudinal giiide-eha-nnel mounted on saidgbeilgiiraine adi'iireny to iis opposite end, la seeond slide-plate lenliriiiidinally reeiproeablein said giiidea'lianne liaving :i pair of bearing pedestals projo-ling upwardly therefi-'oiin akseeondrspindle joiii naled in said bearing: pedesals iii axial alineiiiei'ii; with Said irst,"i'i'ieiil.ioiied spindle, a

pulleyy on said serond spindlejfor Pointing: ilie saine.- a i'iiovable :ilii':i lingn'lieel on the inner end of' said seeond spindle liavingggyiii` operative face opposed to the operaiiif'e fare of said fixed ahrading; wheel.k apringfnieans engaging said seeond,sible-plaie lo draw the .saine forward lo position said movable abrading wheel in operative relatioiilito .said fixed abra-ding wheel. ynie-ana for adjiiatiiig said' seeond.hed-plate i'o determiner izlie. operii'fi ,e spared relation 'of Said movable :ibradling iylieel from said' fixed abrading wheel',`

ay pivoied lever inoiiii'eiliiiroiinerfion iviih said seeond bed-plate, alink means iniereoniiertiiii'f aaid berend alidenplale withl one end oi said levei,' a, lay-shaft, meansfor l l l i 'i mounting yaaid laygaliai't, a rain-wlieel'operated by said laysliaftz and 'engaging lthe op;V

.posite end of said lever io swingihe saine areciproeable ineans projeetin laterally from said bedframe for slidab` y supporting said carriagemember, a roekishaiit. having a rocking arin JournaledA at the oiii'er end of' said guide means, aconnecting-rod iiiteieonneefingg said` raiiiage-nieniber with Said roekingairni, Va,

eranlewlieel on said lay-shaft, a second rorking-arni on'said rook-shaft, a eonneet# `ing-rod interconnecting said fr eranlvwheel with said second rocking-arm, a spindle joiiriniled in said ('arriagi-iineinber, a, Work supporting cradle secured to the forward end oi said Spindle, andl mains operating 'upon the retraetion o said carriage-member te rotate said spindle :loiunpsetting said cradle to dislodge the finishedy Work therefrom. w ,A

.ln a machine ofthe kind described, a bed-frame, a lied-plate having a lengiiiidrY nal guide'eliannel fixed adjacent. toene endl of said bed-frame," a. slide-plate mounted in said channel hai'iinga pair of bearing pedestais Iprojecting upwardly .therefroii1, a, spindie joiirnaled in said bei'iringpedestals.`ay pulley on said spindle for rotating *the same@ a fixed abradinii Wheel fixed on theinner' end of said spindle7 means for adjusting said slide-plaie to deieriniiie the iixed position o said alnading wliiiellq ii `second bed-plate havingi a longii'i'idinal giiideeliaiinel meant.-

ed on said bed-frame adjacent i-o its oppo,

site end, a seeoiid `siide-plaie longitudinally reri n-oea'ble in Vsaid raide channel harina b h a: pair of bearing pedesi'ala projecting iin-f ivardly there-frein1 a second spindle joui# naled in said bearing pedeai'ala in axial aline; mein'y with said first ineiiiioned spiiidiee a pulley on said second spindle JFor rotating; i'lie saine, a nii'ivailile abrading-WliQel ,on the inner end of said seeo-ndapindle having its opera-tive fare opposed lo the operative faee oi xsaid fixed abiai'linp; wheel,.spring-means'l engaging' said seei'iiidslide-plaie to draw the saine icoi'wa rd to position said movable abrading wheel in operative relation torsaid lee fixe-d abiading wheel, means for adjusting l plaie wili one end eisaid leven alaysl'iai'nf means 'l'or'niiiiiniing fia-id lay-shaft, a eamrailing the opposite end of said lei'eiyife airing; the saine to eaiiseilie. retraeion of vsaid iie-oiid slidefplate 'for abnormally. sep- :ii'atine said `movable abrad'ing wheel from `said fixed abradingfwlieel. means for drivf member,y y,gliide-means projecting' laterally f'i-oin said bedframefor slidaibiy supporting -aail carri a gie-"member, aV rook-shaft having a. rocking arm Ijoiirnaled al1 fhe @nier end of vsaid gil-ide means, a connecting-rod interi ie .eolmecting saidarriage-member withl said rocking-arm, a crank-Wheel on said layshaft, a second rocking-arm on said rockshaft, a connecting-rod interconnecting said crank-wheel with said second rocking-arm, a

' spindle journaled in said carriage-member, a

Work supporting cradle secured to the forf ward end of said spindle, and meansloperat'- ing upon the retraction of said carriage-member to rotate saidspindle for upsetting said cradle to` dislodge the finished Worktherefrom, comprising a transverse spindle jour-4 naled in said carriage-member having a drum mounted thereon, awheel on said first mentioned spindle a pull-strap anchored upon *said drum andhaving its opposite. end secured to said wheel, a trip-arm secredto.

- said transverse spindle, a trip-cam with which returnthe same to normal position, and stop means-for determining the normal position p a bed-irax'ma, a fixed rotatable abrading" Wheel, means for mounting said yfixed abrading` Wheel on said bed-frame,h`a lrotatable movable abrading-wheel having its operaytive face' opposedy to the operative face ofy l said fixed abradmgwhecl, means for mounting saidmovable abrading Wheel on said bed-frane-for reeiprocable axial movementthereon, 'spring means for holding and re-A turning said vmovable `abr-siding Wheel to operative relation With said "fixed `abrading Wheel, automatic means for retraeting said movable abrading wheel to abnormally sep-.

arate the same from said fixed abrading wheel to permitthe insertion of Work therebetweem a reciprocahlc Work supporting means operating in timed relation to the movements of said movable abrading` Wheel.

adapted to automatically carry to and from operative relation to said` abrading Wheel the Work to be done.

`11. In a machine of the kind described, a

' bed-frame, a fixed rotatable abrading wheel, v means for mounting said fixed abrading Wheel on said bed-frame, a rotatable movable l abrading-wheel having its operativefaee opl(if) posed to the' operative face ofy said fixedy abrading WheeLmeans-for mounting said movable abradin'g-.,T Wh'eel on said` bed-frame for reciprocable axial movement thereon, spring means for holding and returning said movable abrading wheel to operative relation Wheel operated by said lay-shaft and engagsaid fixed abrading-Wheel, a' reciprocable Work-supporting means operating in timed relation 'to the movements of said movable abrading wheel adapted `to automatically caryy to and 'from operative relation to saidy abiading wheels the Work to be done.

l12. In afmaehinejof the kind described, a 4bed-frame@y a fixed rotatable yaloradlinof Wheel,

means for "mounting said fixed a' rading Wheel on',;"`said bed-frame, a`rotata'ble movable ajrladi'ng vWheel having its operative face yopposed to the operative face of said fixed),` abradin-g Wheel, `means for' mounting -said movable abrading wheel on said bed- -framafo reeiprocable -axial movement thereon, s ring means for holding and returning said movable abrading wheel .to opera-ive relation/with said'fixed abrading wh y"lfa pivotd levlen,` a link means interconne-ctin'gone end of said lever with the mounty .y vying of saidlinvabfle abrad'ing Wheel, a lay- 410. In a machineofrthe vkind described, y'

abnormal separation of said `movable abrad` ing Wheel from said fixed abrading-Wheel, a recirprocable carriage-member, gulde-means projecting laterally from said bed-frame for sli'dablysupporting said carriage-member, a 1 rock-shaft having arocking-arrn journaled at theoute'r end'of saidguide-means, a oonn'ecting rod 'interconnecting said earriagey rmember 'with said rock1ng-arm,a crank-`r wheel onsaid lay-shaft, a second` rockingarm on said rock-shaft, a connecting rod in-l terconnecting said crank-Wheel with said second rocking-arm, and a Work supplorting cradle carried Aby said carriage mem' introducing the `Work between and'in operativev relation to said abrading Wheelsl 13. kyIn a machine of the kind described, a bed-framaa fixed rotatable abrading Wheel, means for mounting said fixed abrading rWheel on said bed-frame, a rotatablemovable abradin-g wheel having its operative face opposed to the operativeface of said fixed abrading wheel, means formonnting said movableabrading wheel on said bed-frame fo1".1-eciprocable axial. movement thereon, sprinrrmeans for holdingr and returning said movable abi-ailing lwheel vto operative relation with said fixed'l-'abrading Wheel, a pivotedlever, a link means interconnecting.,y one end of said lever with the mounting ot' said movable abrading wheeh-a lay-shaft, means for mounting said lay-shaft, a transmission means for driving said lay-shaft, a camer for wheel operated. by said lay-shaft and engaging the opposite end of said p-ivoted lever toistving the same to eausejthe abnormal cable carriage-member, guide-means projectlat'erally from said' 'bed-frame for slid-v ya'lilysupporting said carriage-member, a

rock-shaft having,` a rocking-arm journaled at the outer end of said guide-means, a con- ,nect'ing rod interconnecting said carriagemember with said rocking-arm,` a crank- Whecl 'on said lay-shaft, 'a second rockin-garm on said rock-shaft, a, connecting ro'd interconnecting said crank-Wheel with said second rocking-arm,-asplndlle Journaled in 'said carriage-member, Va Work supporting cradlesecuredv .the forward end of said spindle, and means operating upon rthe rel traction of said carriage-member to rotate from said fixed of sai'dlever with the mjourrtingof .sa v

able afbrading wheel, a lay-shaft, in ns for bei', 'g'rde-mea-ns said spindle for upsetting said cradle to dislodge the finished work therefrom.

14. .In a machine of the kind described, a

'bed-frame, axed rotatable abrading wheel,

means for" mounting sai-d fixed abrading wheel o'n said bed-frame, a rotatable `movable abrading Wheel having vits operative face opposed to the operative face of said fixed abradin-g Wheel, means. for mounting said movable allora-ding Wheel on saidbed-trame for' reci'procablei axial movement thereon,

spring means forholding and returning said movable abrad'ing-wheel to 'operativerelation with said fixed abradingW-heel, a pivoted lever, a link means interconnecting one end movmounting said lay-shaft, a, transmission l,l-igieans for driving said lay-shaft, a cam- Wheel-operat'ed icysaid lay-shaft and engaging the" opposite end of said pivoted lever. to cause the abnormal to swine,r the same separation ot' said movable abrading Wheel alnading-wheel, a reciproca-b-le carriage-member, guide-means projecting laterally from said bed-frame ffor-slidably supporting said carriage-member, a rock-shafthaving!a rocking-arm journa-led at the-outer end of said guide-means, a connectingg,` rod interconnecting said carriagemember with said rocking-arm.,- a crankwhc/el' on said lay-shaft, a second rockinnarm on said rock-shaft, a connoting rod intercmincctmnr said crank-Wheel with said second rmrking-arm, a spindle journaled in said carriage-member,

forwardend ot' said spindle, and means operating upon the retraction of said carriage-member to rotate said spindle Jor 'upsetting said cradle 'to discradle secured lto :the

. lodge the finishedl 4work therefrom, comprising a 'transverse spindle journ-aled vin' said carriage-member havin a duim mounted thereon, a wheel on saidf rst mentioned spindle a pull-'strap .anchoredu-pon' said drum and having its opposlte end secured to said a Work supporting Wheel, a trip-arm secwred to said transverse y spindle, a trip-cam with which said triparm engages upon .the retraction 'of said carriage-member, spring means engaged with said first mentioned spindle to return the same to normal position, and stop means for determining the normal 'position of saidi spindle, and its cradle. f 15. In a machine of the kind described, a bed-frame, a. pair of rotatable kabrading Wheels having their operative facesmiutually opposed, yieldable means normally n f holding said -opposed wheels in Working position, means for automatically separating the opposed Wheels for the insertion of Work l i -ment of said abrading Wheels, and a supporting cradle carried by 'said carriagemember' for introducing the .work between and in operative relation to saidabrading wheels,

y 16. In a machine of the kind described, a bed-frame, a pair of rotatable labrading wheels having their operative faces mutually opposed, yieldable means. normally holding said opposed wheels in Workingposition, means for'automatically separating the opposed Wheelsfor theinsertion of work therebetween, a reciprocable carriage-memprojecting laterally from said bed-frame for slidablyrsupportingsaid carriage-member, means for reciprocating. said carriage-member onfsaid guide ineensen .inv timed relation 'to the separating movement of said abrading Wheels, a spindle ournaled in lsaid carriage-member, a Vwork supporting cradle secured to the Aforward end of,Y said spindle, and meansoperating upon the retraction of said carriage-member to rotate said spindle for upsetting said cradle to dislodge 'thefnished Workthelefrom. 1-10 17. In a machine of the'kind described, a bed-frame, a pair. of rotatableabrading wheels havingtheir operativel faces mutually opposed, means `for automatically se arating the opposed facesvof said 'abrading 115v wheels for the insertion of work therebetween, a reciprocable earriagie-mererv said spindlefor upsetting said cradle to dislodge the fnshed work therefmm,icomprs n .ing u. transmrs spindle?-fjourrmledk in said A carriage-Inemberfhaving a; dum mounted vtheroon,` a; Wheel on saidI rst -mentioned spindle a pull-strap' anchored -upon said drum and having itsopposile end sec'ux'ted to said whe'el, la trip-armseoredto saidytr'an's` vVerse spindle, ai' tripmum with which Saidf l* `triparm engages` ponthe. retractionof said 

